题目

若y=，求的值 答案：【答案】【解析】由二次根式有意义的条件求解的值，再求的值，代入求值即可．解：， --Hi, King, I heard you went to see the parrots instead of traveling to Calgary yesterday. --Yes, I did. You see, I'm ________ a bird watcher than a traveler.A．lessB．moreC．betterD．worse